How'd we get so choosy about friendships late in life? Ask the chimps

How'd we get so choosy about friendships late in life? Ask the chimps

three males groom together Nonhuman animals select whom they socialize with during aging
More at https://www.nsf.gov/discoveries/disc_summ.jsp?cntn_id=301505&WT.mc_id=USNSF_1


This is a Research News item.

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